21662552461541 has 8 divisors (see below), whose sum is σ = 21903108393600. Its totient is φ = 21422507808400.

The previous prime is 21662552461457. The next prime is 21662552461549. The reversal of 21662552461541 is 14516425526612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21662552461541 - 2³⁰ = 21661478719717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21662552461541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21662552461549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127734521 + ... + 127903998.

It is an arithmetic number, because the mean of its divisors is an integer number (2737888549200).

Almost surely, 2^{21662552461541} is an apocalyptic number.

It is an amenable number.

21662552461541 is a deficient number, since it is larger than the sum of its proper divisors (240555932059).

21662552461541 is a wasteful number, since it uses less digits than its factorization.

21662552461541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255639459.

The product of its digits is 3456000, while the sum is 50.

The spelling of 21662552461541 in words is "twenty-one trillion, six hundred sixty-two billion, five hundred fifty-two million, four hundred sixty-one thousand, five hundred forty-one".